Help! Worried +++ First Pregnancy

Hi everyone, I need some big time support. I am 5 wks pregnant as per my LMP. I have no symptoms aside from tiredness (which is normal (for me due to the nature if my work) and a sore boob. I am overly worried as I went to the doctor and didnt request for any blood test, just an ultrasound for wk8. Should I be feeling any other symptoms? Should I have a blood test for hcg tracking or at least a confirmation?

I am overthinking about miscarriage or any other problema as I am not feeling anything at all. I hope you guys can lighten me up a bit.

Thank you! I appreciate you all and this group :)